Steady-state rate-based modelling for CO2/amine absorption-desorption systems

I. Alatiqi, M. F. Sabri, W. Bouhamra, E. Alper

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

A rigorous rate-based steady-state model of an absorber/desorber unit for the removal of CO2 by amine solutions was developed. The model, which essentially contains no empirically assigned parameters, is based on a 'mixing cell' approach and considers both interphase heat and mass transfer along with simultaneous chemical reaction rates. This deterministic model, which simulates tray and packed columns at steady state, has been validated using the data of two commercial monoethanolamine (MEA) plants. For tray columns, each tray was considered to be a mixing cell, while for packed columns, the required dispersion was provided by choosing a finite number of mixing cells. For a specified CO2 slippage rate, the effects of certain operating parameters, such as type and total concentration of amine employed, flow rate and composition of entering gas, on solution circulation rate and reboiler duty can be conveniently predicted. The computer program, written in basic language, is designed in a user-friendly form and is a menu-driven interactive simulator. The mathematical model consists of non-linear algebraic equations and can be operated on a PC. A typical running time on an IBM PS/2 with 25 MHz was 4.39 s for the absorber and 1.1 s for the desorber.

Original languageEnglish
Pages (from-to)3-11
Number of pages9
JournalGas Separation and Purification
Volume8
Issue number1
DOIs
Publication statusPublished - 1994

Fingerprint

Amines
Desorption
Boiler circulation
Reboilers
Ethanolamine
Nonlinear equations
Reaction rates
Computer program listings
Chemical reactions
Mass transfer
Simulators
Gases
Flow rate
Mathematical models
Heat transfer
Chemical analysis

Keywords

  • CO absorption
  • monoethanolamine
  • rate-based simulation

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Steady-state rate-based modelling for CO2/amine absorption-desorption systems. / Alatiqi, I.; Sabri, M. F.; Bouhamra, W.; Alper, E.

In: Gas Separation and Purification, Vol. 8, No. 1, 1994, p. 3-11.

Research output: Contribution to journalArticle

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